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Long-term debt (Tables) | 6 Months Ended
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Jun. 30, 2018
Long-term Debt, by Current and Noncurrent [Abstract] |
Long-term debt, Principal payments |
Twelve month periods ending |  |  | Amount
June 30, 2019 |  | $ | 119,657
June 30, 2020 |  |  | 76,026
June 30, 2021 |  |  | 129,711
June 30, 2022 |  |  | 69,772
June 30, 2023 |  |  | 80,772
June 30, 2024 and thereafter |  |  | 210,317
Total Long term debt |  | $ | 686,255
Unamortized debt issuance costs |  |  | 6,438
Total Long term debt, net |  | $ | 679,817
Current portion of long term debt |  |  | 119,657
Long term debt, net |  |  | 560,160
Interest and finance costs |
|  |  | Six months ended June 30,
|  |  | 2017 |  |  | 2018
Interest on long term debt and capital leases |  | $ | 23,008 |  | $ | 28,691
Less: Interest capitalized |  |  | (1,260) |  |  | (468)
Reclassification adjustments of interest rate swap loss transferred to Interest and finance costs from Other Comprehensive Income (Note 13) |  |  | 473 |  |  | 73
Amortization of debt issuance costs |  |  | 1,288 |  |  | 1,367
Other bank and finance charges |  |  | 257 |  |  | 675
Interest and finance costs |  | $ | 23,766 |  | $ | 30,338

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- Definition Tabular disclosure of interest and finance costs. + References No definition available. + Details
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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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